Battery booster



FIG. 1 is a top perspective view for a battery booster;

FIG. 2 is a bottom perspective view thereof;

FIG. 3 is a bottom planar view thereof; and

FIG. 4 is a top planar view thereof.

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a right-side elevational view thereof;

FIG. 7 is a front-side elevational view thereof; and,

FIG. 8 is a rear-side elevational view thereof. 

CLAIM The ornamental design for a battery booster, as shown and described. 